Thanks for the in depth response, I know the feeling of watching gauges on a long trip, having just returned from a 4 month trip myself.
Similar problems as you, just a different order, head gasket a few months before the trip, so I replaced the head as well.
Then the radiator two weeks into our trip when we reached Cairns.
http://i1224.photobucket.com/albums/...513_083951.jpg
Other than that the reason I'm going to have a 6.5 installed is for better towing ability and reliability.
My mate Pete and I went for a drive down to BD last week, Scotty took us for a tour through their workshop, answered all our questions, then he took us for a test drive in a recently converted Patrol and we were sold.
So if all goes to plan there'll be a new heartbeat fitted in mid February next year.
Thanks to everyone here I've already changed a couple of things in my quote, so if there's anything else you would have done but didn't or did and wished you hadn't please feel free to let me know.
Cheers
Craig